Figure 10: A possible schematic illustration on the formation of the chiral assemblies: (a) ligand molecule; (b) in situ Cu(II)-coordinated complex; (c) stacked in a helical sense to form chiral assembly: the stacking direction of the molecules are from the top of the paper to inside; (d) preformed Cu(o-NpSB); (e) stacked in a random way. For the sake of clarity, only one layer was shown in the Scheme. A multilayer film formation was supposed in the spreading film, which could be regarded as the superposition of the illustrated monolayers.